Rowsets are the central objects that enable all OLE DB data providers to expose data in tabular form. Conceptually, a Rowset is a set of rows in which each row contains columns of data. Base table providers present their data in the form of Rowsets, and query processors present the results of queries in the form of Rowsets.
For detailed information about OLE DB Rowsets, refer to the online OLE DB Programmer's Reference supplied with the OLE DB SDK.